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From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <4DC572F2.9050003@telus.net> <4DC5AB0F.4090507@iup.uni-heidelberg.de> <4DC85118.6060408@freenet.de> <4DC90515.5010203@iup.uni-heidelberg.de> <002d01cc0efc$28f4c8a0$4001a8c0@lark> <4DC91E37.6030406@iup.uni-heidelberg.de>
Date: Tue, 10 May 2011 19:26:07 +0100
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Subject: Re: LF: Spectrum Lab Filtering...
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Hi Stefan, the system described by Wolf does work and works well I thi=
nk it
has been used some time back though maybe not with SL. It was certainl=
y used
for timing synchronous transmissions on 136 about 6 years ago. (CT1DRP=
 to
G3PLX and some others too. ) You need the 1pps and the NMEA.

Keep up the good work.
Alan G3NYK


----- Original Message -----=20
From: "Stefan Sch=E4fer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, May 10, 2011 12:15 PM
Subject: Re: LF: Spectrum Lab Filtering...


Hi Alan,

I'm not an expert of such communication formats but i totally trust th=
e
skills of Wolf. Before some years i think most people would have said
that it's not possible to use MSK transmitter signal as a "quasi perfe=
ct
reference signal" and now we have this function included in SpecLab,
which allows us to display and generate DFCW-60000 and maybe slower...

Let's see what he will perform magic soon! :-)

73, Stefan/DK7FC


Am 10.05.2011 12:22, schrieb Alan Melia:
> Hi Stefan if you are thinking of NMEA for timing I think you will fi=
nd it
> inadequate Andy did some work on this many years back and I believe=
 he
found
> there was an inconsistent delay in the NMEA strings ...... differenc=
es of
up
> to a second I believe. One the Oncore boards from Motorola he found=
 the
> Motorola proprietry comms was much better. NMEA is only intended for
> transmission of data between instruments in relatively slow moving
vessels,
> so that sort of uncertainty is not really an issue.
>
> Alan
> G3NYK
>
> ----- Original Message -----
> From: "Stefan Sch=E4fer"<Stefan.Schaefer@iup.uni-heidelberg.de>
> To:<rsgb_lf_group@blacksheep.org>
> Sent: Tuesday, May 10, 2011 10:27 AM
> Subject: Re: LF: Spectrum Lab Filtering...
>
>
>
>> Wolf,
>>
>> Thanks for the excellent service, once again!
>> I just downloaded the new version on the LF PC and will install it
>> separately. I'll test it with Markus in CW and will give you a feed=
back
>> here.
>>
>> BTW what about the NMEA GPS communication? Does it already work
>> sufficiently? I would have problems to run my grabber PC at 10 SL
>> instances in stereo mode but when beeing /p TXing, it would be a gr=
eat
>> improvement!!!
>>
>> 73, Stefan/DK7FC
>>
>>
>> Am 09.05.2011 22:39, schrieb wolf_dl4yhf:
>>
>>> Hello Scott and Stefan,
>>>
>>> I have just uploaded yet another 'beta' of spectrum lab (V2.76 b24=
) to
>>> this site:
>>>
>>> http://dl4yhf.ssl7.com/speclab/install_speclab_beta.zip
>>>
>>> The automatic multi-notch filter now has up to three adjustable
>>> frequency ranges. If none of the ranges is selected, it operates=
 on
>>> the entire spectrum (in the passband). The active ranges, if any,=
 are
>>> displayed by red horizontal lines in the filter control window (th=
e
>>> graphic part).
>>>
>>> BEWARE: Keep a copy of your old version ! I made so many changes=
 in
>>> the code (mostly for the GPS-sync) that there is the risk that old=
er,
>>> less frequently used (and rarely tested) functions don't work with
>>> this version. If so, please let me know.
>>>
>>> All the best,
>>>    Wolf .
>>>
>>>
>>
>